Fatty15 is a once-daily capsule containing C15:0, also called pentadecanoic acid, and its maker markets it for healthy aging, cellular support, sleep, mood, appetite, and energy. As of October 20, 2026, the visible product listings show $49.95 for a 30-day capsule supply and $149.95 for a 90-day supply; the 90-day subscription listing shows a $119.95 refill price every 90 days. Eligible first-time purchases of a 30-day trial kit, 90-day starter kit, or gummies have a 30-day money-back guarantee when purchased directly from Fatty15. Human research on C15:0 is still developing, while published research and expert discussion give you a useful starting point for understanding this unusual fatty acid. This Fatty15 review covers the ingredient, price, safety, refunds, feedback, and the practical checks to make before ordering.
Disclosure: Some links on this page are affiliate links. We may receive a commission on purchases made through them. There is no extra cost to you.
| What it is | Once-daily C15:0 dietary-supplement capsule |
| Who sells it | Seraphina Therapeutics Inc. |
| Price as shown | $49.95 for 30 days; $149.95 for 90 days, shown October 20, 2026 |
| Guarantee | 30 days for eligible first-time direct purchases |
| Contact | info@fatty15.com or 619-407-9225 |
| Product Page | Where to Buy |
What is Fatty15, and who sells it?
Fatty15 is a capsule supplement made with one named active ingredient: FA15, the brand’s powder form of C15:0. The company behind the site is Seraphina Therapeutics Inc. The maker describes the ingredient as vegan-friendly, dairy-free, lactose-free, gluten-free, and free of preservatives, oil, animal products, corn, soy, and artificial colors.
C15:0 occurs in trace amounts in whole-fat dairy foods and in some fish and plants, according to the maker. Fatty15 is the done-for-you option for someone who wants a measured daily C15:0 capsule instead of trying to source small dietary amounts and track them day after day.
What is in Fatty15?
The original capsule formula is intentionally simple. The maker says the powder is synthesized to match the C15:0 form found in nature.
| Specification | What the label or maker states |
|---|---|
| Active ingredient | FA15, pure pentadecanoic acid (C15:0) |
| Amount per capsule | 100 mg |
| Other active ingredients | None published |
| Suggested daily amount | One capsule |
| Capsule supply shown | 30 or 90 capsules, depending on package |
| Dietary attributes | Vegan-friendly; dairy-free; lactose-free; gluten-free |
How does Fatty15 say it works, and what does the research show?
Fatty15’s maker says C15:0 supports cell membranes, mitochondria, metabolism, mood, appetite, sleep, immunity, liver health, and red blood cells. It also says its customer survey found that some users noticed better sleep, calmer mood, less snacking, or steadier energy within weeks.
A 2020 paper in Scientific Reports, cited in the article’s study list, examined pentadecanoic acid and proposed that it may meet criteria for an essential fatty acid. A 2022 PLOS ONE paper, also listed there, compared C15:0 and omega-3 EPA across human cell-based systems. These are useful early research directions, but they are not the same thing as a long-term clinical outcome study of the finished Fatty15 product.
For a balanced explanation of the current C15:0 discussion, The Proof interview covers population studies, two human trials, cholesterol and glucose questions, and the research still needed. That makes the practical answer to “is Fatty15 worth it?” personal: the formula is unusually simple and convenient, while the clinical picture is still emerging.
Fatty15 pros and cons
| What may appeal to you | What to factor in |
|---|---|
| One named ingredient and a 100 mg listed amount | It costs more per day than simply choosing a food-based source |
| Vegan, dairy-free capsule format | Research on C15:0 supplementation is still developing |
| No fish taste or fishy burps, according to the maker | The direct-purchase guarantee has eligibility limits |
| One-time 90-day purchase is available | Subscription refills and larger kits are not covered by the stated money-back guarantee |
Is Fatty15 better than fish oil?
Fatty15 and fish oil are different supplements, not interchangeable labels for the same nutrient. Fatty15 supplies the odd-chain saturated fatty acid C15:0; fish oil commonly supplies omega-3 fatty acids. Fatty15 says the two fats can complement each other and says its C15:0 had more cellular activities than EPA in its cited comparison research.
Fish-oil research has a much longer history across health outcomes. This overview of omega-3 clinical trials explains why the studied outcome, dose, and population matter when comparing supplements. If an omega-3 has been prescribed for you, the Fatty15 FAQ says to continue it unless your clinician advises otherwise.
Who might choose Fatty15, and who should pause first?
Fatty15 is marketed for adults seeking a simple daily C15:0 routine, including women interested in the brand’s healthy-aging, energy, mood, appetite, and sleep framing. The maker also markets gummies for adults and children, and says its ingredient is suitable for children age 4 and older, pregnancy, and nursing.
If you are pregnant, nursing, taking medication, managing a health condition, or considering changing a prescribed supplement or medicine, bring the exact product and its 100 mg C15:0 amount to your clinician first. That is especially useful when sleep disruption is part of a wider health concern.
Fatty15 side effects and safety
The maker reports that constipation, diarrhea, and headache have been reported by fewer than 0.1% of its customers, while noting it cannot confirm whether C15:0 caused them. Its FAQ says no specific interactions with other supplements or vitamins have been identified.
Dietary supplements are not approved by the FDA before sale. The FDA explains that supplements are regulated differently from drugs, and the FDA does not approve manufacturing facilities. If you develop symptoms that concern you after starting any supplement, contact a clinician or pharmacist with the bottle and full ingredient information.
How do you take Fatty15?
The maker’s direction is one capsule daily. It says you can take it with food or on an empty stomach. Some customers take it in the morning; the maker says others prefer the evening for its sleep-support positioning. The simplest approach is to choose one time you can remember and use the product only as directed.
If waking after two or four hours is the problem you are trying to solve, it helps to look beyond any one supplement. MedlinePlus notes that repeated waking, loud snoring, gasping, leg sensations, daytime sleepiness, and trouble returning to sleep can all be signs worth discussing with a clinician. You may also find our guide to the sleep-hormone connection useful when sleep changes seem tied to your cycle or menopause.
What do Fatty15 reviews and complaints say?
Documented customer comments on the maker’s site describe better sleep, fewer cravings, calmer mood, and more sustained energy. Those are individual reports, not a promise of what you will notice. The maker says 70% of its customers report some benefit within 16 weeks.
For outside product information, SuppCo lists the original C15:0 capsule as a tested product and shows a $1.67 per-serving price from $49.95. The direct feedback that matters most for your order is whether you can use the 30-day direct-purchase guarantee if the product is not a fit, so keep your order confirmation and contact support within the stated window.
Fatty15 price, subscription, shipping, and discount codes
Prices below were shown October 20, 2026; check checkout for today’s price. The product page displayed a DRDREW code offering $101.96 for the 90-day subscription kit, but promo codes can change. The maker’s referral program says new customers can receive 20% off a first 90-day subscription through a referral link.
| Package | Price shown | Ongoing commitment |
|---|---|---|
| 30-day C15:0 capsule supply | $49.95 | One-time product listing |
| 90-day starter kit, subscription | $149.95 initially; $101.96 shown with code DRDREW | Refill pack every 90 days at $119.95; update or cancel anytime |
| 90-day starter kit, one time | $149.95 | No subscription |
| U.S. subscription shipping | Free shipping stated | Applies to every U.S. subscription order |
Yes, you can buy Fatty15 without a subscription: the maker offers a 90-day one-time starter kit. It says in-stock orders ship within one to three business days, then generally arrive in five to seven business days in the United States.
How do refunds, returns, and cancellations work?
Fatty15’s returns page gives a 30-day money-back guarantee for first-time, eligible direct purchases of one 30-day trial kit, one 90-day starter kit, or one gummies pouch. You must submit the request within 30 days of your first purchase order date by email at info@fatty15.com or phone at 619-407-9225. The policy excludes six-month and annual kits, subscription refills, repeat purchases of the same product type, and orders returned without authorization.
To cancel a subscription, the FAQ says to log into your account, select “Manage Subscription,” choose the subscription, and select “Cancel Subscription.” If you bought through a third-party seller, that seller handles the refund under its own policy.
Is Fatty15 legit or a scam? What to check before buying
“Legit” and “scam” searches are really buyer-protection questions. Fatty15 identifies Seraphina Therapeutics Inc. in its terms, provides an email address and phone number, offers a direct-purchase refund route, and sells a one-time 90-day kit as well as a subscription. Its FAQ says Fatty15 is also sold on Amazon, but a direct order is the route covered by Fatty15’s stated 30-day guarantee.
For the cleanest paper trail, use a payment method with purchase protections, save the confirmation email, confirm the package selected before paying, and read the refund eligibility line before choosing a larger kit. When you are ready to compare today’s bundle options, use the Product Page.
Can food provide C15:0 instead?
The maker says C15:0 occurs in trace amounts in whole-fat dairy products, some fish, and some plants. Food is the everyday route; Fatty15 is the measured, vegan C15:0 capsule route. Neither choice needs to be treated as all-or-nothing. If you want a supplement because measuring foods feels like another task to manage, the one-capsule format is the brand’s practical advantage.
Before you order Fatty15
- Choose between the 30-day supply, the 90-day one-time kit, and the recurring refill plan.
- Confirm whether your chosen kit qualifies for the 30-day direct-purchase guarantee.
- Check the final price and any current discount code at checkout.
- If you buy through Amazon or another seller, read that seller’s return terms before paying.
- If poor sleep is your main concern, also consider practical sleep factors such as caffeine, alcohol, schedule, pain, and sleep position. Our tips for reducing pain while sleeping may help you look at the whole routine.
Fatty15 FAQ
Is Fatty15 really worth it?
It may be worth the price if you value a vegan, single-ingredient 100 mg C15:0 capsule and prefer the convenience of a measured daily routine. The one-time 90-day kit lets you avoid a subscription, while the eligible 30-day direct-purchase guarantee gives first-time buyers a defined return window.
What supplement is comparable to Fatty15?
A C15:0 supplement is the closest category comparison. Fish-oil omega-3 products are fatty-acid supplements too, but they provide different fatty acids and should not be treated as the same formula.
Is Fatty15 sold at Walmart?
The maker specifically names its own website and Amazon as purchase options. For the stated Fatty15 direct-purchase guarantee, order through Fatty15.com.
Is there a Fatty15 discount code?
The product listing showed code DRDREW for the 90-day subscription kit on October 20, 2026. The maker also describes referral discounts for a first 90-day subscription. Check checkout because promotions can change.
Can Fatty15 help when I keep waking at night?
The maker markets C15:0 for sleep support and shares customer reports about deeper sleep. Repeated waking can have many causes, though. The NHS lists stress, alcohol, caffeine, menopause, pain, snoring, interrupted breathing, and some medicines among possible contributors to insomnia, so a persistent pattern deserves a clinician conversation.
By The Nerve & Joint Pain Desk Editorial Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
Keep reading